Clock-alarm



(No Model.)

0. H. WOODWORTH.

' OLOOK ALARM.

NQ. 2'71,012. Patented Jan.23,1883. v

Win asses. 122092250)".

PATENT OFFICE.

ORSON H. WOODWORTH, OF COLUMBIA CITY, INDIANA.

CLOCK-ALARM.

SPECIFICATION forming part of Letters Patent No. 271,012, dated January23, 1 8

Application filed September 6, 1882.

To all whom it may concern:

Be it known that I, 0RsoN El. WOODWORTH, a citizen of the United States,residing at Columbia City, in the county of Whitley and State ofIndiana, have invented a new and useful Improvement in Clock-Alarms, ofwhich the following is a specification.

The objects of my improvement are to produce an alarm of a morediscordant character than is produced in the ordinary manner, to prodnce a double and triple alarm, and also to produce an intermittentalarm. I attain these objects by the mechanism illustrated in theaccompanying drawing, in which the figure is a general view of myinvention with some contiguous parts.

The ordinary springs,driving-wheel,ratchet, click, pinions, posts, andother parts, are most- 1y omitted, as not being essential to anunderstanding of the distinctive features of my invention.

P represents the lower plate of the alarm, the upper plate beingindicated by broken or dotted lines, and the whole alarm being attachedto the back of the clock in the usual way.

WV represents the alarm escapement-wheel,

attached to escapement-shaft S in the usual manner, as shown. This wheelis constructed withoutteeth on nearly one-half of its periphery, as fromN to N On each side of the escapement-wheel W,

and directly opposite each other, the verges V and V are set, and heldin position by the upper and lower plates, these "erges being attachedto their respective verge-shafts F and F in the ordinary manner, as setforth.

To the shafts F and F are fastened the ordinary hammer-arms, A and Acarrying the hammers H and H, which strike the bells B and B to producethe alarm. The bells are of different sizes and tones. The smaller isplaced within the larger, the two being separated by washer'R, and bothfirmly attached to the clock-frame D, as indicated.

The shafts F and F are provided with alarm drop-levers O, which connectwith the clockmovement in the usual manner by means of wires VI.

(N0 model.)

Operation: The alarm escnpemen t-wheel W, revolving in the directionindicated by the arrow, imparts motion to the verges, thereby causing analarm on both bells until the point N has passed beyond verge V, whenthe motion of verge V ceases; but the motion of verge V continues withincreased force, because the power of the alarm-spring escapesexclusively through verge V and the toothless portion of the peripheryof wheel W is passing verge V. When point N reaches verge V it is againset in motion, and when point N reaches verge V both verges are inmotion until point N passes verge V when the motion of the latter ceasesand verge V receives the full power of the alarm-spring. Thus, in asingle revolution of wheel W-starting from the position showir in thedrawing-there is, first, an alarm through both verges and hammers onboth bells; second, an exclusive alarm through verge V and hammer H onbell B third, an alarm on both bells; fourth, an exclusive alarm on bellB; or, in other words, the alarm may be described as being effected,first on the small bell, then on both together, and then on thelargebell. It is apparent that the alarm on both bells together is of veryshort duration. The discordance, and consequently efi'ectiveness, ofthis alarm depends largely on the dissonant tones of the bells.

This clock-alarm is cheap and simple in construction, and very efiectivein operation.

Iclaim as my invention 1. The combination of an esoapement-wheel denudedof part; of its teeth, and verges arranged, substantially as described,so as to be alternately in contact with the denuded portion of saidwheel.

2. The combination of an escapement-wheel denuded of part of its teeth,and verges placed upon opposite sides of said wheel, for the purposesetforth.

ORSON TI. VVOODVV ORTH.

Witnesses: i A I WM. H. MAGLEY, H. L. RUOH.

